We investigate the cooperative diversity gain in underlay cognitive radio (CR) systems where secondary users access the spectrum licensed to primary users under an interference …
Cognitive radio (CR) is considered one of the prominent techniques for improving the utilization of the radio spectrum. A CR network (ie, secondary network) opportunistically …
JH Lee, W Choi - IEEE Transactions on Signal Processing, 2013 - ieeexplore.ieee.org
In this paper, we propose opportunistic jammer selection in a wireless security system for increasing the secure degrees of freedom (DoF) between a transmitter and a legitimate …
Capacity of the cognitive radio network degrades due to the interference constraint from the primary network. The secondary network capacity can be enhanced in a cost effective way …
In this paper, we consider user scheduling and power allocation techniques for downlinks where transmitted message must be kept confidential from all other unintended users and …
H Seo, J Park, M Bennis, W Choi - 2018 IEEE International …, 2018 - ieeexplore.ieee.org
This paper proposes Consensus-Before-Talk (CBT), a spectrum etiquette architecture leveraged by distributed ledger technology (DLT). In CBT, secondary users' spectrum …
H Song, JP Hong, W Choi - IEEE Transactions on Wireless …, 2013 - ieeexplore.ieee.org
Cognitive radio (CR) systems are typically classified into two types. In overlay CR, a secondary user opportunistically accesses primary user's spectrum when it is unused, while …
S Dang, JP Coon, G Chen - IEEE Transactions on Vehicular …, 2016 - ieeexplore.ieee.org
In this paper, we propose a novel relay selection scheme for orthogonal frequency-division multiplexing systems by combining conventional bulk and per-subcarrier selection schemes …
S Ekin, MM Abdallah, KA Qaraqe… - IEEE Transactions on …, 2012 - ieeexplore.ieee.org
This paper investigates the performance of an orthogonal frequency-division multiplexing (OFDM)-based cognitive radio (CR) spectrum sharing communication system that assumes …